Russia's ballistic missile attack on Ukraine's capital, Kyiv, killed at least one person; a Ukrainian attack on Russian border town killed six, officials say.

Igor Kirillov, who was named the head of Russia’s nuclear defense forces in April 2017, was under sanctions from several countries including the U.K. and Canada for his role in Ukraine.

A top Russian general accused of using chemical weapons on the battlefields in Ukraine was killed after a bomb went off in Moscow early Tuesday, Russian investigators said, in an attack swiftly claimed by Kyiv.

Slovakia is dependent on gas passing through its neighbour Ukraine, and it has ramped up efforts to maintain those flows from 2025 while criticising Ukrainian President Volodymyr Zelenskiy for refusing to extend the contract expiring at the end of the year.

Slovakia's Prime Minister Robert Fico has made a surprise visit to Moscow for talks with Vladimir Putin - becoming only the third Western leader to meet the Russian president since the full-scale invasion of Ukraine three years ago.